Monitor riser shelf



FIG. 1 is a front, top, right side perspective view of a monitor riser shelf showing my new design;

FIG. 2 is a rear, bottom, left side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a rear elevation view thereof.

The broken lines in the drawings are for the purpose of illustrating portions of the monitor riser shelf that form no part of the claimed design. 

CLAIM The ornamental design for a monitor riser shelf, as shown and described. 